Im also interested in responses to this question. I currently am running Forte II's, driven by one of several Marantz vintage receiver / amps, and RB81's, same electronics. I wouldn't be replacing the Forte II's, just adding a system, essentially. Good, tight bass WITHOUT using a sub is one REQUIREMENT....a center channel wouldn't be out of the question, and am interested in exploring that as a separate issue......(that would probably be designed/built by me, or using one RB81, unless someone has a NIB Academy laying about somewhere, lol.....